RU2103541C1 - Engine electric starting and tank electric loads power supply system - Google Patents

Abstract

FIELD: electrical equipment of armored vehicles. SUBSTANCE: a thyratron motor, consisting of a synchronous three-phase inductor-type motor with a built-in rotor position pickup, rectifier-inverter and an inverter control circuit, is used as the starter-generator; a relay of the thyratron motor independent excitation winding is introduced. EFFECT: improved design. 3 cl, 1 dwg

Description

 The invention relates to systems for electric engine starting and power supply to consumers of objects of armored vehicles, mainly to main tanks and objects based on them.

 Known systems for electric engine starting and power supply to consumers of objects of armored vehicles, in which to start the engine of the object and to power consumers with electronic energy, one electric machine is used - a starter-generator.

 Closest to the invention is a system for electric starting the engine and supplying tank consumers with a starter-generator, a voltage relay-relay, switching into protective equipment, batteries (see Electrical equipment of armored vehicles. M .: Military Publishing House, 1976, p. 118, 186, 220 Edited by A. Belonovsky).

 In this system, as a starter-generator, a low-voltage direct current electric machine is used with its inherent disadvantages of the brush-collector assembly, limiting the generator power, reducing the reliability and service life of the generator. When the engine of the tank is started electrically by a starter-generator, a current of about 2000 A is consumed, which leads to premature failure of the batteries and the inability to make repeated attempts to start the engine due to excessive discharge of the batteries during previous starts.

 The objective of the invention is to remedy these shortcomings, increase the power of the generator of the power supply system with limited overall mass indicators, improve the working conditions of the batteries during electric start of engines, and also increase the reliability of electric start of the tank engine.

 This problem is solved by the fact that in the known system of electric engine start and power supply of tank consumers, an alternating current electric machine is used as a starter-generator, made according to the scheme of a valve motor - an alternating current induction machine with an integrated rotor position sensor (DPR), powered from a constant current network current using a static converter-rectifier-inverter. The use of an electric alternating current machine as a starter-generator eliminates the disadvantages caused by the presence of a brush-collector assembly for direct current machines, and the generator power increases in comparable overall mass parameters. In addition, due to the controlled start-up of an alternating current electric vehicle, the current consumed by the starter when starting the tank engine is significantly reduced.

 The invention is illustrated in the drawing, which shows a block diagram of a system for electric starting an engine and supplying consumers with a tank.

 The proposed system contains a starter-generator, voltage regulator 2, electrical noise filters 3, battery protection unit 4, rechargeable batteries 5, battery switch 6, as well as a relay starter-generator, starter switching unit, starter starter, matching automation device and other elements the start-up and control and switching equipment of the electric engine start-up system and the power supply of the tank consumers, shown in the block diagram by one unit 7, performing the function of the launch control system in a known electric engine start system. As a starter-generator 1, a synchronous AC induction electric machine with an integrated rotor position sensor 8, made on the Hall elements, is used. Due to the use of an alternating current electric machine as a starter-generator, the known system for electric starting the engine and supplying energy to the tank’s consumers further comprises a rectifier inverter 9 and a control inverter 10, as well as an excitation relay of the starter-generator 11.

The rectifier-inverter 9 is designed to perform two functions:
-transformation of a three-phase alternating voltage generated by the starter-generator 1 in the generator operating mode into a constant voltage of the on-board network of the tank;
-conversion of the DC voltage of the batteries 5 into a three-phase alternating voltage required to power the starter-generator 1 in the starting mode of operation when starting the tank engine.

 The control circuit of the inverter 10 is used to control the inverter 9 by signals from the rotor position sensor 8 and the start control system 7. The rotor position sensor 8 is designed to provide a signal to the control circuit of the inverter 10 in order to open the corresponding transistors of the inverter 9 depending on the position of the rotor of the starter generator . Due to this, the self-synchronization of the inductor electric machine in start-up mode is carried out. In connection with the use of a rectifier 9 operating on the on-board network, there is no need to automatically turn on the starter-generator 1 in the electrical equipment network and disconnect it from the network. This function in the well-known voltage regulator relay was performed by a differential-minimum relay. In the proposed power supply system for consumers, the voltage regulator 2 performs a single function - it provides automatic regulation of the voltage of the generator 1 within the specified limits when the rotation speed, load and temperature change due to the impact on the excitation winding 12 of the starter generator.

 Due to the need to switch the field winding 12 in the starter mode of operation of the starter generator 1 to a battery voltage of 48 V, a field coil relay 11 is introduced into the circuit, the opening contact of which provides the generator mode, and the closing contact - the starter mode of operation of the starter generator 1.

 The block diagram also shows the engine of the tank 13 and the button of the starter-generator 14, which are sources of input signals when analyzing the operation of the power supply system and the electric start-up system, as well as the gearbox 15 of the starter-generator.

 When implementing the invention, there is no difficulty, since the elemental base of the proposed devices is well known and commercially available, and the valve motor is made in a prototype version by the staff of the Moscow Energy Institute and the Military Academy of Armored Forces.

The use of the proposed system of electric engine start-up and power supply to consumers at objects of armored vehicles will allow solving a number of fundamentally important tasks:
- the issue of a significant increase in generator power in the existing overall mass indicators is being addressed. So, in comparison with the well-known starter-generator SG-10-1, the power of the proposed alternator in the same overall mass parameters is doubled;
- due to the frequency-current control of starting an electric AC machine in the starter mode of operation of the starter-generator, there is a real possibility of reducing the starting currents in the known system. In this regard, the operating conditions of the batteries are significantly improved when the engine is started, the causes that lead to their premature failure are eliminated, the reliability of starting the tank engine increases, and, as a result, the combat readiness of the object increases;
- the absence of a brush-collector unit at the starter-generator increases the reliability and durability of the entire proposed system of electric starting of the engine and power supply of tank consumers.

Claims (3)

 1. The system of electric starting of the engine and power supply of the tank’s consumers, consisting of a starter-generator, voltage regulator, two electrical noise filters, starting-switching and protective equipment, storage batteries, characterized in that a valve motor consisting of a three-phase synchronous motor is used as a starter-generator an electric inductor machine with a built-in rotor position sensor, a rectifier-inverter and an inverter control circuit; an independent excitation relay is introduced, When the rotor of the starter-generator is connected through a gearbox to the engine of the tank.  2. The system according to claim 1, characterized in that the phase winding of the starter-generator in the generator mode of operation is connected through a rectifier-inverter, a radio noise filter, a battery protection unit with batteries and consumer circuits, and in the starter mode of operation through a rectifier-inverter and the inverter control circuit, depending on the signal of the rotor position sensor, through the start-up control system with batteries.  3. The system according to claim 1, characterized in that the field winding of the starter-generator in the generator mode of operation is connected via a field coil relay and a voltage regulator, a radio noise filter and a battery protection unit with batteries, while the voltage regulator is also connected to the output of the rectifier -inverter, and in starter mode it is connected to the batteries through the field winding relay and the start control system.